The main content of this article is an educational training document for CNC lathe set-up. Based on personal learning experiences, it transforms the traditionally oral knowledge into written documentation, providing a detailed explanation of the process of CNC lathe set-up. Its goal is to help individuals who are interested in learning CNC lathe set-up to acquire relevant knowledge and skills more efficiently, enabling them to contribute to the production line in the shortest time. Additionally, based on the knowledge of CNC lathe set-up, this article also conducts a study on tool monitoring. The aim is to rapidly detect the current state of cutting tools, assisting on-site personnel in determining the right time for tool maintenance. It also establishes a set of tool inspection methods, which may be a reference for future process improvements.